Vibration-motor



G. RAMSEY VIBRATION MOTOR.

APPLICATION FlLED MAR. 27. I9l8.

Patented May 24, 1921.

' 2 SHEETS-SHEET l- G. RAMSEY.

INVENTOR Patented May 24, 1921.

2 SHEETSSHEET UNITED STATES GEORGE RAMSEY, OI BROOKLYN, NEW YORK, ASSIGNOR TO MARGUERITE OF MONTREAL, QUEBEC, CANADA.

PATENT OFFICE.

v. o'L maY,

VIBRATION-MOTOR.

Specification of Letters Patent.

latented May 24, 1921.

Application filed March 27, 1818. Serial No. 225,029.

To all whom it may concern.

Be it known that I, Gnonon RAMsnY, a citizen of the United States, and a resident of the city of Brooklyn, in the county of Kings, State of New York, have invented certain new and useful Im rovements n Vibration-Motors, of which t e following is a s ecification.

his invention relates broadly to motors, and more particularly to an lmprovement on the motor disclosed in the application of Leslie R. McDonald, Serial No. 104,095, filed June 16, 1916.

The principal object of the present 1nvention is to provide an improvement on the said type of motor wherein power is trans mitted from the vibrating member to the driven member for each movement of the vibrating member, 71. e., the transmisslon power occurs during the inward swing and also during the outward swmg of the v1- brating element.

A further object of the present invention is to provide a motor of the character specified with a pair of transmission bands, one of which is operative when the vibrating member moves in one direction, and the other of which is operative when the vibrating member moves in'the opposite direction, in such manner that twodriving impulses occur for each oscillation of the vibratory member.

A still more specific object of the'present invention is a motor of the character speclfied wherein a pair of transmission bands are secured to the arms of the vibrating fork in suoh'manner that one band is operative when the prongs of the fork are approaching, and the other 1s operative when the prongs of the fork are receding, one from the other.

A still further and equallyprimary object ject of the present invention is an improvement in the motor of the character specified, and wherein each prong of the vibrating fork has power transmission members secured directly to the prongs and are connected to a transmission band; and also wherein each prong carries a bracket extendthe action of the wheel.

. brackets.

ing beyond the median plane between the prongs with power transmitting members secured to the outer ends of the. brackets, which power transmission members are likewise connected to a transmission band so that on an inward swin of the prongs the first mentioned transmission members approach each other, while the second mentloned transmission members recede from each other. a Other and further objects of the present 1I1V81'1t10n will in part be obvious and will in part be pointed out hereinafter in the specification following by reference'to the accompanying drawings wherein like charactors are used to re resent like parts throughout the several figures thereof.

Figure 1 is a plan view of one embodiment of the present invention.

Fig. 2 is an elevational view showing'the parts of the device in section.

Fig. 3 1s a diagrammatic view illustrating parts when the prongs parts when the prongs are 1 Y diagrammatic view show-j shown in Fig. 6 when applied to a rotatable.

Fig. 9 is a perspective viewof one of the Fig. 10 is asectional view of one of the brackets taken on line A-A of Fig. 11.

Fig. 11 is an end view of one of the bracketslooking at the base of the bracket.

Heretofore in the art it has been customary, in relation to this type of vibrating motor, as disclosed in the application of Leslie R. McDonald, Serial No. 104,095,' filed June 16, 1916, above referred to, to utilize only one-half of an oscillation of the oscillatin member as a power transmitting perioi During the other half of such movement the swing oftheoscillating member has acted somewhat as a fly-wheel so that this move ment constitutes an energy storing portion of the cycle. It has also been the custom heretofore to take off power from the stored energy in the oscillatin member rather than from the portion of t e cycle wherein the energy is directly applied. In a common form of this motor an electric coil is laced between the rongs of a fork capa 1e of vibration simllar to a tuning fork, so that when the coil is properly energized to constitute an electromagnet the prongs of the fork will be drawn inwardly or attracted to the poles of the magnet. 11 this common form of this motor the power transmitting elements have been secured to the prongs in such manner that when the prongs approach each other under influence of the electric current, the power transmitting devices are inoperative and only become operative when the prongs swing outwardly after the electrical influence has subsided. It therefore will be seen that the driving energy transmitted to these members comes from the inertia or momentum of the forks after the electrical influence has substantially subsided.

The present invention constitutes the improvement which, among other things, per- ,amits energy to be transmitted from the vibrating. prongs to the driven member at a time when the vibrating prongs are under positive energy impulse that is, the power transmission takes placewhen the electrical coil is energized to attract or draw inward the prongs of the vibrating form. This construction permits the positive force to be used rather than the force which is stored by momentum.

The present invention further includes the combination of the constructions previously discussed so that the energy may be applied to the driven member both on the outward swing of the vibration prongs, and also on the inward swing. This construction produces a very even torque, and also increases the power factor. 7

Referring now to the drawings and more particularly to Figs. 1 and 2, the motor frame 1 carries the vibrating fork 2 having prongs 4 and 5 and being provided with tuning weights-6 and 7 whereby the period of vibration of the prongs 4 and 5 is controlled in such manner that it corresponds to a predetermined period preferably consonant with a standard alternating current cycle, such as sixty cycles per second. A solenoid or coil of insulated wire 8 is mounted on a laminated core 9 which carries the I pole pieces 10 and 11. This electro-magnetic suitable material which is mounted on a shaft 18 that is 'ournaled to rotate in the bearin post 19. ower transmissionmembers 20 an 21 are secured directly to the prongs 4 and 5, respectively, and preferably comprise pieces of leather or suitable material which may be treated with a stiffening compound, such as for example, shellac. It is to be noted that the power transmission members extend toward the pulley 17 in the shape of a distorted V with a transmission band 22 joined at the apex of the V and extending around the pulley 17 with the free end secured to a coiled spring 24 which is anchored in an opening in the tensionadjustment plate 25. Attention is particularly called to the fact that the power transmission member 20 is joined to the prong 4 nearer the pulley 17 and is shorter than the companion transmitting member 21. This relation is important in that it produces better results than where the power transmission members are of the same length. The operation as it is understood is due to the fact that direct longitudinal pull on the band 22 comes more especially on the power transmission member 20 and the power transmission member 21 produces a sidewise movement that accentuates the amplitude of the waves set up in the band 22. The function of the spring 24 is to impose a continuous and substantially predetermined load or tension on the band 22. This tension may be changed by adjusting the coil spring 24 in various openings of the tension plate 25. Changing of tension on the band 22 changes the length of the waves in the band and thereby controls the speed of the driven member or pulley 17. The transmisson elements previously described transmit power to the driven member during the outer swing of the prongs of the fork.

Each prong of the fork carries a stiff,

rigid bracket 26 (see Figs. 9, 10 and 11)' post 30. These brackets are adapted to be secured to the prongs 4 and-5 and extend toward the opposite prong and beyond the median plane between the prongs so that the related action of the posts 30 is opposite to the related actions of the prongs, z. e., as the prongs separate the posts approach and vice versa. Transmission members 31 and 32 are secured to the posts 30 in a manner similar to that described relative to the power transmission members 20 and 21. A transmission band 34 is secured to the memhere 31 and 32, passes around the pulley 17 and is attached to a spring 35 wh1ch is anchored to a tension bracket 36. It is the intention and desire that the last mentioned transmission members shall be duplicates of the first mentioned transmission members,

with the exception that the power is transmltted through and from the second mentioned transmission members at a time when thefirst mentioned members are not transmitting.

The action of the devices as they are un derstood may be better explained by references to Figs. 3 to 8, inclusive. In Fig. 3 the prongs 4 and 5 are just completing the outward swing. It will be noted that the prongs are separated substantially to their extremity of movement and that the posts 30 are substantially at their inner extremity of movement. t will also be noted that the band 22 is under tension, that is drawn outwardly, while the band 34 is relaxed. Fig. 4 is similar to Fig. 3 but illustrates the parts when ap roaching the inward limit of movements or ,the prongs 4 and 5, which is the outward limit of movement for the osts 30. Figs. 5 and 6 are believed to be'i ustrative of the condition of the bands when the parts are in the positions illustrated in Figs. 3 and 4 so that Fig. 5 corresponds to Fig. 3; Fig. 6 corresponds to Fig. 4. The band which occupies the straight line has just finished its power stroke, whereas the band which is waved has just finished its recession movement and is ready to bein the powerstroke. Figs. 7 and 8 are ilustrative of principles shown in Figs. 5

and 6 and wherein the transmission bands are shown as being wrapped about the pulley 17. It is the intention of these figures to illustrate that the maximum eflorts of the band 22 occur during the minimum efforts of the band 34, and vice versa.

It is desired that the foregoing discussions as to theory are to be understood as illustrative and not be considered in a limiting sense since when the motor is functioning various auxiliary waves and forces, no doubt, exist so that it is doubtful if there is any time when either of the bands is entirely devoid of wave motion as might be indicated by straight lines in the diagrammatic figures; and it is also desired that it be understood that the specific constructions herein disclosed are preferred constructions but are merely examples of types that may be used in carrying out this invention.

Having thus described my invention what claim is:

1. The method of producing rotary motion in a rotatable drum mounted in frictional engagement with a palr of flexible members; which comprises producing lon itudinal vibrations in the said members iy successively increasing and decreasing the tension on said members by forces applied to one end of the said members and in the direction of their lengths in such manner as to establish transverse waves in said members; and applying said forces in alteration whereby the tension on one of the members tri'c current to drive said rotary is increased when thetension on the other of said members. is decreased.

2. The method of producing rotary motion from induced wave motions in a drum mounted in frictional contact with a air of flexible members; which comprises afternately inducing transverse wave motions in each of saidmembers whereby the waves in one member alternate with the waves in the other member, substantially as described.

3. The method of producing rotary motion from vibratory forces in a drum having a pair of substantially non-stretchable flexible bands passed around the drum to be rotated; which comprises rapidly varying the tension on one end of the said bands to set up transverse waves in said bands where-- by the wave motion causes the drum to be rotated and whereby the wave motion of one band alternates with the wave motion of the other band.

4. The method of transmitting power in a movable device which consists in causing a vibratory member to vibrate at its normal rate of vibration; then utilizing the vibrations to produce wave motion in a pair of bands and wherein the wave motion 1s eflective in but one direction; then controlling the waves so that the vibrations in one band alternate with the waves in the other band whereby the motion is transformed into a uni-directional movement of a movable device.

5. The method of utilizing power from induced wave motion to produce rotary motion by utilizing a vibratory member having a definite normal rate-of vibration; which method comprises inducing vibration in said member; then transforming each movement of said member into induced wave motion'in flexible transmission bands applied to a revoluble'member whereby the sum of all of the movements of said vibratory member are translated into a continuous rotation of said revolu'ble member. 110

6. In a device of the character described, in combinatioma motor comprising a rotary member, a flexible band around and in contact with said rotary member,.asecond flexible band around and in contact with said ro- 115 tary member, and electromagnetic means adapted when energized by a suitable elecmaintain alternate pulsations in said bands whereby the pulsations set up wave motion in said band to continuously 120 member in a single direc- 7 As an article of manufacture, an energizer for an electric motor, comprising in combination, vibratory means having a definite normal rate of vibration, electromagnetic devices adapted when energized by a suitable current to maintain said means in vibration, and a pair of flexible members secured to said means in such manner as to be 0 alternately energized by said means to receive alternate pulsations in the direction of their length and thereby establish transverse waves in said members when said means vibrates.

8. In a vibration motor comprising a vibrating fork, and means to vibrate the fork,

the combination of a plurality of transmis said fork in such manner that transverse waves are set up in the bands when the fork vibrates, a rotating device in operative relation to said transmissionbands, and anchoring devices connecting said transmission bands to said fork in such manner that certain of said bands are operative to drive said rotating member when other of said bands are inoperative.

10. In a motor of the character described, comprising a vibrating fork, an electromagnetic means for vibrating said fork, a transmission band, rotary means in operative relation to said transmission band, and securing devices operatively connecting said transmission band with both prongs of said fork in such manner as to establish wave motion in the band and so that said transmission band delivers power impulses to said rotary means from both prongs of said fork when the electromagnetic forces are maximum.

11. A motor of the character described, comprising a vibrating fork, electromagnetic means for vibrating said fork, in combination with a transmission band, a rotary member in operative relation to said transmission band and adapted to be driven by said transmission band, anchoring members secured to the prongs of the vibrating fork and extending inwardly beyond the median plane between the prongs so that when the prongs of the fork move toward each other the free ends of the anchoring members move away from each other, and connections between said anchoring members and said transmission band.

a 12. As an article of manufacture, the ower element of a vibrating motor comprising a fork adapted to be vibrated, an electromagnet unit capable when properly energized of vibrating said fork, in combination with a plurality of transmission bands operatively connected to the prongs of said fork in such manner that wave motion is established in the bands when the prongs vibrate and so that the power factors in said bands are alternately effective whereby one of said bands will give maximum eflort when the other of said bands will give minimum effort to rotate suitable. rotary devices.

'13. A motor of the character described comprising in combination a rotatable drum,

, a pa1r of bands in operative engagement with said drum, anchoring means for one end of said bands and vibrating means for theother end of said bands, with said vibrating means adapted to establish alternate vibrations in said bands substantially as described.

GEORGE RAMSEY. 

